Warm air blower

ABSTRACT

The present disclosure provides a warm air blower. The warm air blower comprises a shell, a support, a cross-flow wind wheel and a volute tongue, wherein the cross-flow wind wheel and the volute tongue are arranged in the shell, the cross-flow wind wheel is located between the volute tongue and the shell, and the support is connected with the shell; and the cross-flow wind wheel comprises two oppositely arranged fixed plates and a plurality of blades connected between the two fixed plates, the cross section of the blade is arc-shaped, and the range of the arc-shaped chord length is 9-10 mm. According to the technical scheme, the frequency concentration of noise is avoided, the noise intensity is reduced, and the use experience of a user is improved.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a U. S. patent application which claims the priority and benefit of Chinese Patent Application Number 202120783423.0, filed on Apr. 16, 2021, the disclosure of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the technical field of warm air blowers, and specifically relates to a warm air blower using a cross-flow wind wheel.

BACKGROUND

The cross-flow wind wheel is widely used in the field of warm air blowers, and therefore the requirement for noise control of the cross-flow wind wheel is high. The warm air blower comprises a shell, a heating device, a volute tongue and a cross-flow wind wheel, the cross-flow wind wheel is driven by a transmission shaft of a motor to rotate, blades of the cross-flow wind wheel drive peripheral airflow to flow in the rotating process, and the airflow flows through the blades twice, flows in from the blades on one side of the cross-flow wind wheel and flows out from the volute tongue. When airflow flows through the blades twice, the airflow can form a flowing vortex in the wind wheel, the size and the position of the vortex affect the through-flow capacity and noise of an indoor unit to different degrees, certain whistling sound can be generated in the flowing process, and the noise of the same type and frequency is superposed to bring a resonance peak value. Therefore, the overall noise generated by the wind wheel used by an existing warm air blower is large, and the user experience is seriously affected.

SUMMARY

In order to solve the problem, the present disclosure provides a warm air blower, and solves the problem that a cross-flow wind wheel of the warm air blower generates noise and affects the user experience when working.

The present disclosure is realized through the following technical scheme:

The present disclosure provides a warm air blower. The warm air blower comprises a shell, a support, a cross-flow wind wheel and a volute tongue, wherein the cross-flow wind wheel and the volute tongue are arranged in the shell, the cross-flow wind wheel is located between the volute tongue and the shell, and the support is connected with the shell; and the cross-flow wind wheel comprises two oppositely arranged fixed plates and a plurality of blades connected between the two fixed plates, the cross section of the blade is arc-shaped, and the range of the arc-shaped chord length is 9-10 mm.

Further, the fixed plate is circular, the ends of the blades penetrate through the fixed plates and extend outwards, and the blades are evenly distributed along the circumferential outer edges of the fixed plates at intervals.

Further, a plurality of reinforcing plates are further arranged between the two fixed plates at intervals, and the blades penetrate through the reinforcing plates and extend outwards.

Further, the blades are arranged between the two fixed plates in a rightward inclined mode along the axis direction of the cross-flow wind wheel, and included angles theta are formed between the blades and the fixed plates and range from 80° to 90°.

Further, one end of the cross-flow wind wheel is provided with a rotating shaft, the shell is provided with a first bearing sleeve, and the rotating shaft is accommodated in the first bearing sleeve.

Further, the end, away from the rotating shaft, of the cross-flow wind wheel is provided with a second bearing sleeve, the warm air blower further comprises a motor arranged on the shell, and the second bearing sleeve is arranged on an output shaft of the motor in a sleeving mode.

Further, the warm air blower further comprises a heating device arranged in the support.

The present disclosure has the following beneficial effects:

The shell and the support are connected to form the shell of the warm air blower, the volute tongue is located on one side of the support, an open groove is formed in the shell, the open groove is an air inlet of the warm air blower, and the volute tongue is an air outlet. When the cross-flow wind wheel rotates, the blades drive peripheral airflow to flow into the cross-flow wind wheel and generate whistling sound in the rotating process, the chord length of the blade is set to be 9-10 mm, the time for all parts on the same blade to pass through the minimum gap between the blades at different moments is prolonged, and the generated whistling sound is reduced; and the frequency range of the noise during the operation of the cross-flow wind wheel is wider, and the resonance peak value caused by the superposition of the noise of the same type and frequency is avoided, so that the frequency concentration of the noise is avoided, the noise intensity is reduced, and the use experience of a user is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall schematic diagram of a warm air blower proposed in the present disclosure;

FIG. 2 is a locally enlarged schematic diagram of part A in FIG. 1 proposed in the present disclosure;

FIG. 3 is an overall schematic diagram of a warm air blower proposed in the present disclosure;

FIG. 4 is an overall schematic diagram of a cross-flow wind wheel proposed in the present disclosure; and

FIG. 5 is a locally enlarged schematic diagram of part B in FIG. 4 proposed in the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to more clearly and completely illustrate the technical scheme of the present disclosure, the present disclosure is further described below in conjunction with the attached figures.

Referring to FIG. 1 to FIG. 4, a warm air blower comprises a shell 1, a support 2, a cross-flow wind wheel 3 and a volute tongue 4, the cross-flow wind wheel 3 and the volute tongue 4 are arranged in the shell 2, the cross-flow wind wheel 3 is located between the volute tongue 4 and the shell 1, and the support 2 is connected with the shell 1; and the cross-flow wind wheel 3 comprises two oppositely arranged fixed plates 31 and a plurality of blades 32 connected between the two fixed plates 31, the cross section of the blade 32 is arc-shaped, and the range of the arc-shaped chord length 321 is 9-10 mm

In the embodiment, the shell 1 is used for providing an accommodating space for the volute tongue 4 and the cross-flow wind wheel 3, one face of the shell 1 is connected with the support 2 to form the shell of the warm air blower, the volute tongue 4 is located on one side of the support 2, an open groove is formed in the shell, the open groove is an air inlet (unmarked) of the warm air blower, and the volute tongue 4 is an air outlet (unmarked) of the warm air blower. Specifically, when the cross-flow wind wheel 3 rotates, airflow flows in from the air inlet of the warm air blower, passes through the cross-flow wind wheel and then is blown out from the air outlet.

In the embodiment, both ends of each blade 32 are fixed to the two fixed plates 31 respectively. The section, perpendicular to the axis plane direction of the cross-flow wind wheel 3, of the blade 32 is arc-shaped, and the 321 of the arc-shaped chord length is 9-10 mm. Specifically, when the cross-flow wind wheel 3 rotates, the blades 32 drive peripheral airflow to flow into the cross-flow wind wheel 3 in the rotating process and generate whistling sound in the wind sweeping process, the chord length 321 of the blade 322 is set to be 9-10 mm, the time for all parts on the same blade 32 to pass through the minimum gap between the blades 32 at different moments is prolonged, and the generated whistling sound is reduced; and the frequency range of the noise during the operation of the cross-flow wind wheel 3 is wider, so that the frequency concentration of the noise is avoided, the noise intensity is reduced, and the use experience of a user is improved.

Referring to FIG. 2 and FIG. 4, the fixed plate 31 is circular, the ends of the blades 32 penetrate through the fixed plates 31 and extend outwards, and the blades 32 are evenly distributed along the circumferential outer edges of the fixed plates 31 at intervals. In the embodiment, the blades 32 are evenly distributed along the circumferential outer edges of the fixed plates 31 at intervals to form the cross-flow wind wheel 3, and the cross-flow wind wheel 3 is cylindrical.

Referring to FIG. 2 and FIG. 4, a plurality of reinforcing plates 33 are further arranged between the two fixed plates 31 at intervals, and the blades 32 penetrate through the reinforcing plates 33 and extend outwards. Specifically, the reinforcing plates 33 arranged at intervals are further arranged between the two fixed plates 31 so that the effect of reinforcing the structural strength of the cross-flow wind wheel 3 can be achieved.

Referring to FIG. 2, FIG. 4 and FIG. 5, the blades 32 are arranged between the two fixed plates 31 in a rightward inclined mode along the axis direction of the cross-flow wind wheel 3, and included angles theta are formed between the blades 32 and the fixed plates 31 and range from 80° to 90°. In the embodiment, each blade 32 is in a long strip shape, each blade 32 is an inclined blade 32 obliquely arranged rightwards along the axis direction of the cross-flow wind wheel 3, the extending direction of each blade 32 is not parallel to the axis direction of the cross-flow wind wheel 3, the included angle between each blade 32 and the fixed plate 31 is theta, and the included angle theta ranges from 80° to 90°. Specifically, the blades 32 and the fixed plate 31 are vertically arranged, so that airflow at each part of the same blade 32 can pass through the minimum gap of the blades 32 at different moments, and the types and frequencies of noise generated by each part of the same blade 32 are diversified, so that the resonance peak value caused by the superposition of the noise of the same type and frequency is avoided, the frequency concentration of the noise is avoided, the noise intensity is reduced, and then the working noise of the warm air blower is reduced, and the use experience of a user is improved.

Referring to FIG. 1, FIG. 3 and FIG. 4, one end of the cross-flow wind wheel 3 is provided with a rotating shaft 34, the shell 1 is provided with a first bearing sleeve 11, and the rotating shaft 34 is accommodated in the first bearing sleeve 11. In the embodiment, the rotating shaft 34 is convexly arranged on the surfaces, facing the shell 1, of the fixed plates 31, correspondingly, the first bearing sleeve 11 is arranged at the position, facing the rotating shaft 34, of the shell 1, and a rotating shaft 34 is arranged in the first bearing sleeve 11. The rotating shaft 34 is accommodated in the first bearing sleeve 11, and is inserted in the inner ring of the bearing 34. Specifically, the rotating shaft 34 is accommodated in the first bearing sleeve 11, and is inserted in the inner ring of the bearing 34. The vibration of the cross-flow wind wheel 3 in the rotating process can be effectively reduced, so that the rotation of the cross-flow wind wheel 3 is more stable, the structure of the warm air blower is more stable, and meanwhile, the noise of the warm air blower can be effectively reduced due to the reduction of the vibration and the stability of the structure.

Referring to FIG. 1 to FIG. 4, the end, away from the rotating shaft 34, of the cross-flow wind wheel 3 is provided with a second bearing sleeve 35, the warm air blower further comprises a motor 5 arranged on the shell 1, and the second bearing sleeve 35 is arranged on an output shaft of the motor 5 in a sleeving mode. In the embodiment, the motor 5 sleeves the output shaft of the motor 5 through the second bearing sleeve 35 so as to drive the cross-flow wind wheel 3 to rotate. Specifically, when the motor 5 rotates, the output shaft of the motor 5 drives the second bearing sleeve 35 to rotate, the second bearing sleeve 35 is arranged on the fixed plates 31 and then drives the cross-flow wind wheel 3 to rotate, and at the moment, the rotating shaft 34 located at the other end rotates in an inner ring of a bearing of the first bearing sleeve. The second bearing sleeve 35 is connected with the output shaft of the motor 5 in an interference fit manner, so that vibration generated between parts is reduced, on the other hand, the load of the motor 5 is also reduced, and then the noise of the warm air blower is effectively reduced. The first bearing sleeve 11 and the second bearing sleeve 35 can be made of rubber and silica gel sleeve materials.

Referring to FIG. 1, the warm air blower further comprises a heating device 21 arranged in the support 2. Specifically, airflow sequentially passes through the cross-flow wind wheel 3 and the heating device 21 from the air inlet and then is blown out from the air outlet. The heating device 21 can be a PTC heating device.

Of course, the present disclosure is also susceptible to various other embodiments, based on which those skilled in the art can obtain other embodiments without any creative work, all falling within the scope of protection of the present disclosure. 

What is claimed is:
 1. A warm air blower, comprising a shell (1), a support (2), a cross-flow wind wheel (3) and a volute tongue (4), wherein the cross-flow wind wheel (3) and the volute tongue (4) are arranged in the shell (2), the cross-flow wind wheel (3) is located between the volute tongue (4) and the shell (1), and the support (2) is connected with the shell (1); and the cross-flow wind wheel (3) comprises two oppositely arranged fixed plates (31) and a plurality of blades (32) connected between the two fixed plates (31), the cross section of the blade (32) is arc-shaped, and the range of the arc-shaped chord length (321) is 9-10 mm.
 2. The warm air blower according to claim 1, wherein the fixed plate (31) is circular, the ends of the blades (32) penetrate through the fixed plates (31) and extend outwards, and the blades (32) are evenly distributed along the circumferential outer edges of the fixed plates (31) at intervals.
 3. The warm air blower according to claim 1, wherein a plurality of reinforcing plates (33) are further arranged between the two fixed plates (31) at intervals, and the blades (32) penetrate through the reinforcing plates (33) and extend outwards.
 4. The warm air blower according to claim 1, wherein the blades (32) are arranged between the two fixed plates (31) in a rightward inclined mode along the axis direction of the cross-flow wind wheel (3), and included angles theta are formed between the blades (32) and the fixed plates (31) and range from 80° to 90°.
 5. The warm air blower according to claim 1, wherein one end of the cross-flow wind wheel (3) is provided with a rotating shaft (34), the shell (1) is provided with a first bearing sleeve (11), and the rotating shaft (34) is accommodated in the first bearing sleeve (11).
 6. The warm air blower according to claim 5, wherein the end, away from the rotating shaft (34), of the cross-flow wind wheel (3) is provided with a second bearing sleeve (35), the warm air blower further comprises a motor (5) arranged on the shell (1), and the second bearing sleeve (35) is arranged on an output shaft of the motor (5) in a sleeving mode.
 7. The warm air blower according to claim 1, wherein the warm air blower further comprises a heating device (21) arranged in the support (2). 